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/*
Copyright (C) 2008 Paul Davis
Author: Dave Robillard
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_interactive_item_h__
#define __ardour_interactive_item_h__
#include <libgnomecanvasmm/text.h>
#include "simplerect.h"
namespace Gnome {
namespace Canvas {
/** A canvas item that handles events.
* This is required so ardour can custom deliver events to specific items
* (e.g. to delineate scroll events) since Gnome::Canvas::Item::on_event
* is protected.
*/
class InteractiveItem {
public:
virtual bool on_event(GdkEvent* ev) = 0;
};
/** A canvas text that forwards events to its parent.
*/
class InteractiveText : public Text, public InteractiveItem {
public:
InteractiveText(Group& parent, InteractiveItem* parent_item, double x, double y, const Glib::ustring& text)
: Text(parent, x, y, text)
, _parent_item(parent_item)
{}
InteractiveText(Group& parent, InteractiveItem* parent_item)
: Text(parent)
, _parent_item(parent_item)
{}
bool on_event(GdkEvent* ev) {
if(_parent_item) {
return _parent_item->on_event(ev);
} else {
return false;
}
}
protected:
InteractiveItem* _parent_item;
};
class InteractiveRect: public SimpleRect, public InteractiveItem
{
public:
InteractiveRect(Group& parent, InteractiveItem* parent_item,
double x1, double y1, double x2, double y2)
: SimpleRect(parent, x1, y1, x2, y2)
, _parent_item(parent_item)
{}
bool on_event(GdkEvent* ev) {
if (_parent_item) {
return _parent_item->on_event(ev);
} else {
return false;
}
}
protected:
InteractiveItem* _parent_item;
};
} /* namespace Canvas */
} /* namespace Gnome */
#endif /* __ardour_interactive_item_h__ */
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